PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-19:27:50
G03     216.6          62.5               14.1 +/-    1.01      15.7 +/-    1.01  0.060 / 0.060
G07     252.2          10.9               -5.0 +/-   15.22     -13.7 +/-   15.22  0.050 / 0.060
G09     306.8          22.1               12.2 +/-    1.85      25.4 +/-    1.85  0.150 / 0.250
G14     104.6          11.3               11.9 +/-    2.12      32.3 +/-    2.12  0.180 / 0.270
G16     113.9          63.2               13.3 +/-    1.17      14.7 +/-    1.17  0.030 / 0.040
G22     189.6          47.5               13.7 +/-    0.70      17.9 +/-    0.70  0.030 / 0.040
G23     326.0          55.7               12.4 +/-    0.76      14.6 +/-    0.76  0.130 / 0.420
G26     59.6           47.5               10.2 +/-    1.01      13.2 +/-    1.01  0.120 / 0.300
G31     55.9           14.2               10.2 +/-    3.12      25.9 +/-    3.12  0.090 / 0.310